With the Bureau of Alcohol, Tobacco and Firearmsreporting that gun shop burglaries are continuing to rise at an alarming rate, it is no wonder the agency has stepped in to help the Upper Darby Police solve its latest case.

According to data from the agency, gun shop burglaries have risen more than 70 percent since 2013 and the number of firearms stolen has more than doubled, up almost 134 percent during the same period.

It's part of the reason the ATF has prioritized investigations of gun shop burglaries like the one at the Double Action Indoor Range and Archery in Upper Darby.

"These guys knew what they were doing and were able to get in through the roof," said Upper Darby Police Superintendent Michael Chitwood.

Authorities said four men left behind a porter cable circular saw that they used to cut a hole in the roof of the building.